The 831752I is a high-performance, differential HCSL clock switch. The device is designed for the routing of PCIe clock signals in ATCA/AMC system and is optimized for PCIe Gen 1, Gen 2 and Gen 3. The device has one differential, bi-directional I/O (FCLK) for connection to ATCA clock sources and to clock receivers through a connector. The differential clock input CLK is the local clock input and the HCSL output Q is the local clock output. In the common clock mode, FCLK serves as an input and is routed to the differential HCSL output Q. There are two local clock modes. In the local clock mode 0, CLK is the input, Q is the clock output and FCLK is in high-impedance state. In the local clock mode 1, CLK is the input and both Q and FCLK are the outputs of the locally generated PCIe clock signal. The 831752I is characterized to operate from a 3.3V power or 2.5V power supply. The 831752I supports the switching of PCI Express (2.5 Gb/s), Gen 2 (5 Gb/s) and Gen 3 (8 Gb/s) clock signals.


  • Clock switch for PCIe and ATCA/AMC applications
  • Supports local and common ATCA/AMC clock modes
  • Bi-directional clock I/O FCLK: -When operating as an output, FCLK is a source-terminated HCSL signal. - When operating as an input, FCLK accepts HCSL, LVDS and LVPECL levels.
  • Local clock input (CLK) accepts HCSL, LVDS and LVPECL differential signals
  • Local HCSL clock output (Q)
  • Maximum input/output clock frequency: 500MHz
  • Maximum input/output data rate: 1000Mb/s (NRZ)
  • LVCMOS interface levels for the control inputs
  • PCI Express (2.5 Gb/S), Gen 2 (5 Gb/s) and Gen 3 (8 Gb/s) jitter compliant
  • Full 3.3V or 2.5V supply voltage
  • Lead-free (RoHS 6) 16-lead TSSOP package
  • -40°C to 85°C ambient operating temperature

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
831752AGILF Last Time Buy PGG16 TSSOP 16 I Yes Tube
831752AGILFT Last Time Buy PGG16 TSSOP 16 I Yes Reel

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
831752I Datasheet Datasheet PDF 479 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB
AN-839 RMS Phase Jitter Application Note PDF 149 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB
AN-815 Understanding Jitter Units Application Note PDF 476 KB
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB
PDN# : CQ-19-01 Quarterly Market Declined PDN Product Discontinuation Notice PDF 537 KB
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB